First time smoking in 3 months how long will weed stay in my system?

I haven’t smoked in 3 months and before that it was like 4 months, I only smoked2 small bowls and shared it, but the THC level was 27%, I’m 170lbs and my metabolism isn’t fast, but I have a coast guard drug test that I need to pass, how long do you think it’ll be out of my system enough to pass a drug test and what could I do to make it go out faster?